line double cylinder, piston movement one up and the other down, it make engine high revolution speed and low vibration, ensure comfortable riding.
With chain transmission to avoid noise from gear transmission.
Adopting automatic tension structure by spring, it can automatically adjust tension according to stretch of chain, it can reduce noise form chain movement and prolong chain life.
Adopting 9-piece imported tooth-shape chain with high precision, it can make engine better sound with longer chain life.
Adopting cast-iron rocker arm holder, effectively get rid of noise form valve clearance change due to heat.
Adopting double carburetor structure to make full and complete combustion withe lower fuel consumption and good exhaustion.
With line 2 cylinders to make powerful performance and stable running.
